Installation Guide 873 SmartRadar Control Unit & Antenna

Installation guide873 SmartRadarControl Unit &Antenna UnitRev. 7January 2006Part no. 4416.569Enraf BVPO Box 8122600 AV DelftNetherlandsTel.FaxE-mailWebsite: 31 15 2701 100: 31 15 2701 111: info@enraf.nl: http://www.enraf.comInstallation guide 873 SmartRadar Control Unit & Antenna UnitPage 1

PrefacePrefaceThe 873 SmartRadar is a radar-based level gauge for liquid storage tanks.This installation guide is intended for technicians involved in the mechanical and electricalinstallation of the Enraf series 873 SmartRadar Control Unit and Antenna Unit.EC declaration of conformityRefer to the EC declaration of conformity, shipped with the instrument.Note:All connections to the instrument must be made with shielded cables with exception of themains, alarm outputs and Enraf field bus cable. The shielding must be grounded in the cablegland on both ends of the cable.Legal aspectsThe mechanical and electrical installation shall only be carried out by trained personnel withknowledge of the requirements for installation of explosion-proof equipment in hazardous areas.The information in this installation guide is the copyright property of Enraf BV, Netherlands.Enraf BV disclaims any responsibility for personal injury or damage to equipment caused by: Deviation from any of the prescribed procedures;Execution of activities that are not prescribed;Neglect of the general safety precautions for handling tools and use of electricity.The contents, descriptions and specifications in this installation guide are subject to change withoutnotice. Enraf BV accepts no responsibility for any errors that may appear in this installation guide.Additional informationPlease do not hesitate to contact Enraf or its representative if you require additional information.Page 2

SafetySafetySafety aspects of 873 SmartRadarWarningDo not use the instrument for anything else than its intended purpose.The housing of the 873 SmartRadar is explosion-proof: II 1/2 G EEx de [ib/ia] IIB T6; KEMA 02ATEX2301 X, certified by KEMA, Netherlands.Class I, Division 1, Groups B, C & D according to ANSI/NFPA, certified by Factory MutualResearch Company (FM no.: 2Z5A6.AE).Environmental conditions for the 873 SmartRadar are:ambient temperatureoperating pressure::relative humidityingress protection::-40 to 65 C (-40 to 149 F)atmospheric for RoD antennamax. 6 bar for F06, F08, S06 . S12, W06 and T06 antennasmax. 20 bar for H02 antennamax. 40 bar for H04 antenna0 - 100 %IP65 (NEMA4), suitable for outdoor installationThe covers of Antenna Unit and Control Unit are provided with blocking facilities which preventunauthorised opening.The Control Unit has two separate cable entries for intrinsically safe options.WarningImproper installation of cable glands, conduits or stopping plugswill invalidate the Ex approval of the SmartRadar.The emitted microwave energy is far below acceptable limits for exposure to human body.2Depending on the type of antenna, a maximum radiation of 0.03 mW/cm is generated.Installation guide 873 SmartRadar Control Unit & Antenna UnitPage 3

SafetyPersonal safetyThe technician must have basic technical skills to be able to safely install the equipment.When the 873 SmartRadar is installed in a hazardous area, the technician must work inaccordance with the (local) requirements for electrical equipment in hazardous areas.WarningIn hazardous areas it is compulsory to use personal protection and safety gear such as:hard hat, fire-resistive overall, safety shoes, safety glasses and working gloves.Avoid possible generation of static electricity.Use non-sparking tools and explosion-proof testers.Make sure no dangerous quantities of combustible gas mixturesare present in the working area.Never start working before the work permit has been signed by all parties.Pay attention to the kind of product in the tank. If any danger for health,wear a gas mask and take all necessary precautions.Safety conventions“Warnings”, “Cautions” and “Notes” are used throughout this installation guide to bring specialmatters to the immediate attention of the reader. Page 4A Warning concerns danger to the safety of the technician or user;A Caution draws the attention to an action which may damage the equipment;A Note points out a statement deserving more emphasis than the general text, but notrequiring a “Warning” or a “Caution”.

Mechanical installationMechanical installationNote:The entire installation procedure shall be in accordance with national, local and companyregulations.Mechanical installation Control UnitThe installation of the Control Unit is commonfor all antenna types. The Control Unit can beinstalled on or next to the tank.Maximum distance from Antenna Unit:150 m (500 ft).Place Control Unit against a vertical mountingplate (or other suitable place).Minimum size for the mounting plate is:230 mm (9") height by 140 mm (5½”) width.Note:Weight of Control Unit is 14 kg (31 lbs).Refer to appendix A for dimensions of ControlUnit and drilling plan of mounting holes.Figure 1Control Unit on mounting plateFigure 1 gives an example of the Control Unitinstallation.Note:Leave sufficient space for the infra red connector at the bottom left side of the Control Unitand for removal of the front and rear cover.Refer to the dimensional drawing of the Control Unit in appendix A.CautionThe Control Unit, its mounting plate and the Antenna Unit must havethe same ground reference (grounded to the tank).Installation guide 873 SmartRadar Control Unit & Antenna UnitPage 5

Mechanical installationMechanical installation Antenna UnitThe installation is common for all Antennatypes. Refer to appendix A for the dimensionsof the Antenna Unit.Antenna and tank separator should already beinstalled (refer to installation guide SmartRadarantennas).Install Antenna Unit on the tank separator asfollows:1) Place Antenna Unit on tank separator;mind locking pin!2) Turn coupling nut manually securingthe Antenna UnitFigure 2H04 tank separatorNote:The H04 tank separator has two locking pin holes. Position Antenna Unit so that the locking pinof the Antenna Unit is placed in the locking pin hole which is 90 away from the vent plug(figure 2).CautionThe Antenna Unit and Control Unit must have the same ground reference(grounded to the tank).Page 6

Electrical installationElectrical installationThe entire electrical installation shall be in accordance with the International Standard IEC 79-14for electrical equipment to be installed in hazardous areas.WarningMake sure that all power to the instrument is switched off before opening the covers of the873 SmartRadar. Failure to do so may cause danger to persons or damage the equipment.All covers of the 873 SmartRadar (Control Unit and Antenna Unit)must be closed before switching on the power.CautionBefore opening the covers of theControl Unit, make sure thatthe blocking devices (‘A’ for thefront cover and ‘B’ for the rear cover)are removed (figure 3).Use Allen key 3 mm.Figure 3Blocking / sealing facilitiesCautionDo not damage the thread of covers and the Control Unit and Antenna Unitand keep the thread free of dirt.After opening, grease it lightly with anti seize grease.When closing, never tighten the covers before the threads are properly engaged.The covers should be turned counter-clockwise until the thread ”clicks“ in place,then turn clockwise until the covers are fully closed.After closing the covers, do not forget to place the blocking devices.Installation guide 873 SmartRadar Control Unit & Antenna UnitPage 7

Electrical installationPreparing SmartRadar for electrical installationMains voltage selectorCheck whether voltage selector is set correctly as indicatedon identification label of Control Unit as well as for thepresented supply.The voltage selector is located inside electroniccompartment at top of the backplane (figure 4).The Control Unit operates on a mains voltage of110, 130, 220 ( 10% to -20%) and 230 Vac ( 15%).A special 65 Vac ( 10% to -20%) is available.Power rating: 25 VA; frequency: 50 to 60 Hz ( 10%);Imax 2 A.Install an explosion-proof mains switch in the mains supplycable to each Control Unit.Specify which switch you need to operate the SmartRadarControl Unit.Figure 4Voltage selectorNote:For 240 V supply voltage, set voltage selector to 230 V.Supply voltage may then vary 10% to -20%.To change the voltage setting, proceed as follows:1) Check the local mains voltage2) Open front cover of Control Unit3) If necessary, change voltage selector to applicable voltage: remove mains supply indication plateslide switch in appropriate position (figure 4)place mains supply indication plate and lock it4) Close front coverCautionChanges of the mains setting shall be marked on the identification label of the Control Unit.Page 8

Electrical installationExternal fusesThe 873 SmartRadar Control Unit is internally fused on secondary side of the transformer(fuses are located on GPS board). Therefore, external fuses must be installed in the mains supplycable to each Control Unit.Mains voltageFuse value (in accordance with IEC 127-2-3)220 / 230 Vac110 / 130 Vac65 Vac315 mA slow630 mA slow1 A slowGroundingThe Control Unit and Antenna Unit should be properly grounded to the ground reference(generally the tank). This is a safety grounding requirement.For this purpose, the Control Unit and Antenna Unit have external ground terminals.CautionAntenna Unit and Control Unit must have the same ground reference.CautionSafety depends on proper grounding. Check the resistance of the ground connectiondirectly after installation. The measured ground resistance shall be below the maximumprescribed by local grounding requirements.WarningWhen measuring the ground resistance, use a suitable explosion-proof tester.Note:Grounding shall be performed in accordance with local regulations.Installation guide 873 SmartRadar Control Unit & Antenna UnitPage 9

Electrical installationCable glands / conduitCable glands:Explosion-proof (Ex-d) or increased safe (Ex-e) cable glands must be used, depending on localrequirements. Refer to the Ex-marking on the identification label of the Control Unit to determinewhich type of cable gland is required.Note:Mount the glands according to the supplier’s instructions.Conduit:If the SmartRadar is installed in a hazardous area, threaded rigid metal conduit or threaded steelintermediate metal conduit shall be used.Note:If the SmartRadar is installed in a hazardous area, stopper boxes must be applied within 18inches (0.45 m) from the Antenna Unit and Control Unit to seal the cabling in the conduits.Depending on the wiring configuration,two or more ¾” NPT threaded cable glands(or rigid conduits) may be required with theControl Unit.The Antenna Unit requires a (flexible) conduitwith one ½” NPT connection at the AntennaUnit side. The length of the flying leads fromthe Antenna Unit is 4 metres (13 ft).If the Control Unit is located within thisdistance, a direct connection can be madebetween Antenna Unit and Control Unit.If the distance is longer, a junction box and aseparate four-core cable is required.The optional Enraf installation kit contains aflexible conduit (1 m) with ½” NPT connectionsand an Ex-e junction box with ¾” NPT cableentry (refer to appendix A).Page 10Figure 5Cable entries at Control Unit

Electrical installationNote:Seal the unused cable inlets with an approved ¾” NPT threaded stopping plug.WarningImproper installation of cable glands, conduit or stopping plugs willinvalidate the Ex approval of the 873 SmartRadar.Non-intrinsically safe cablingThe terminal compartment of the ControlUnit is divided in a non-intrinsically safepart and an intrinsically safe part.Cable entries are all ¾” NPT.The non-intrinsically safe cabling may onlyenter at the centre and two right hand sidecable entries (figure 6).WarningOnly open the terminal compartmentcover (rear cover) when the poweris switched off.Figure 6Terminal compartment Control UnitInstallation guide 873 SmartRadar Control Unit & Antenna UnitPage 11